GFA-585SE vs GFA-5705
The GFA-5705's power @ 8ω is 200W against the GFA-585SE's 450W, its power @ 4ω 300W against 600W, and its signal-to-noise 106 dB against 76 dB. Both share input impedance (22000Ω).
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower Amplifiers
Estimated price (community-sourced)
$3,799
Around — community and catalog average, updates slowly
About the GFA-585SE
The Adcom GFA-585se is a muscle amplifier capable of delivering very large peaks into low impedances, exceeding 50 amperes per channel. It represents a modern revival of Adcom's classic designs, with every component carefully selected and upgraded for improved performance. The amplifier features balanced and unbalanced inputs, is bridgeable into a powerful monoblock configuration, and is designed to drive low impedance speaker systems down to 2 ohms. Laboratory testing by Newport Test Labs measured both-channels-driven power output into 8Ω as 496 watts per channel, exceeding the 450-watt specification, with the ability to deliver this power consistently across the entire audio spectrum from 20Hz to 20kHz. The frequency response extends from 1.5Hz to 216kHz at the 3dB down-points, demonstrating both flat and extended response characteristics. The amplifier weighs 32kg and measures 275 × 482 × 502mm, requiring substantial rack or floor space.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 450W @ 8Ω
- Power @ 4Ω
- 600W @ 4Ω
- Amplifier Class
- AB
- Minimum Impedance
- 2Ω
- Input Sensitivity
- 2.7V RMS
- Input Impedance
- 22000Ω
Analog Output
Analog signal output specifications
- SNR
- 76 dB
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- Balanced, Unbalanced
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 482 × 275 × 502 mm (W × H × D)
- Weight
- 32 kg (71 lbs)
Key Specifications
Power: 450W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions